Patent WO-2012150875-A2 (WO)
Inventor: KOLEVATOV MIKHAIL NIKOLAEVICH
IPC: B66B21/06
Filed: 2012-04-03
Abstract: The invention relates to lifting devices and, in particular, to continuous passenger conveyance, and can be used in spiral and linear escalators for multi-storey buildings and structures. The rotating spiral escalator, which has a central vertical column, guide tracks which run spirally along the vertical length thereof, steps which are provided with rollers adjacent to the guide tracks, a drive member which connects the steps and moves in the relevant transportation direction, an upper and a lower bend portion and a step return zone outside the transportation zone, is characterized in that the central vertical column is additionally equipped on the outside of the column with at least one horizontal guide rail, the guide tracks are fastened to a bearing frame which is equipped with additional rollers that are adjacent to the guide rail, and the bearing frame is mobile, can rotate about the axis of the central vertical column and is provided with a drive mechanism that enables the rotating movement of the bearing frame in the opposite direction to the movement of the steps along the guide tracks and at a speed equal to the horizontal component of the speed of movement of the steps, wherein the steps are able to move vertically upwards or downwards relative to the column on the inclined portions of the guide tracks and to remain stationary relative to the landings on the horizontal portions of the guide tracks; entrance platforms, situated in proximity to the upper and lower bend portions, are secured to the bearing frame, balustrades with handhold devices are also secured to the bearing frame, wherein the handrails move relative to the bearing frame in the same direction as the steps; landings are situated, with a minimum permissible clearance, around the circumference formed by the radially outer mobile balustrade, the surface of the landings is on the same plane as the surface of the mobile entrance platforms, the radially outer sides of which are adjacent to the radially inner sides of the landings with clearance therebetween, the mobile entrance platforms are equipped with handrails, the bearing frame, with the exception of the sites of the horizontal portions of the guide tracks and the mobile entrance platforms, is provided with landing barriers which are situated along the radially inner side of the landings and are fastened to the bearing frame such that they are rotatable about the axis of the central vertical column. In one possible embodiment, the radially outer balustrade is provided only on the inclined portions of the guide tracks, wherein on the horizontal portions of the stair web, from the radially outer side of the steps, the bearing frame is additionally provided with side boarding platforms which are arcuate in plan view and comprise a web which moves along a closed loop, wherein the speed and direction of movement of the top part of the web of the mobile side boarding platforms is the same as the speed and direction of the steps on the adjacent horizontal portion of the stair web relative to the bearing frame. In another possible embodiment, the central vertical column is rigidly connected to the bearing frame and is mobile and rotatable about its own axis, wherein the guide rails are fastened to the first floor and to the radially inner side of the landing. In further possible embodiments of the rotating spiral escalator, the spiral of the guide tracks, which are fastened to the bearing frame, is arranged in such a way that the horizontal portions of the stair web are situated one above the other or on opposite sides of the central vertical column and the escalator is used simultaneously for ascending and descending; furthermore, the stair web may comprise an enlarged step with a depth sufficient to accommodate a child's pushchair or a wheelchair, and a pushchair/wheelchair entry point is indicated on the landings. The proposed device makes it possible to increase the safety of transporting people to an upper or lower floor by extending the points of entry to and exit from the escalator by means of the rotation of boarding platforms around the circumference of the radially inner sides of the landings, as well as by excluding the horizontal movement of the steps by having the steps and the bearing frame move in opposite directions.